What Is a High Palate? | Causes, Signs & Treatment

If you’ve noticed your baby struggles to latch during feeding, or your child has crowded teeth and mouth-breathes, a high palate might be the cause. Also called a high-arched or high-vaulted palate, this condition makes the roof of the mouth steep and narrow rather than wide and flat. , and while it’s often linked to genetic conditions, it can also develop from everyday habits.

What Exactly Is a High Palate?

A high palate means the roof of the mouth is taller and narrower than normal — specifically, palatal height two standard deviations above the average.

The condition is often congenital, developing before birth when the palatal shelves don’t fuse properly. Beyond genetics, several factors can cause or worsen a high palate:

• Tongue tie (ankyloglossia) — a short or tight frenulum restricts tongue movement, keeping the tongue from pressing against and widening the palate during growth.
• Chronic thumb-sucking or pacifier use — prolonged pressure from a thumb or pacifier can mold the palate into a narrower shape.
• Mouth breathing — often from allergies or nasal blockages, mouth breathing leads to poor tongue posture that reshapes the palate over time in growing children.
• Prolonged intubation — extended use of an endotracheal tube in infancy can deform the palate.
• Genetic syndromes — high palate is associated with Marfan syndrome, Down syndrome, Crouzon syndrome, Apert syndrome, Treacher Collins syndrome, and others.

Medical literature on high-arched palate confirms these structural and developmental causes.

Signs and Symptoms to Watch For

A high palate can affect breathing, feeding, speech, and dental alignment. The signs differ by age, but the common thread is that these are functional problems — not merely cosmetic.

Infants and babies: difficulty latching during breastfeeding, coughing or choking during bottle feeds, poor weight gain, and noisy breathing. If feeding is a struggle, bottles designed for high palate can help reduce choking and improve feeding success.

Children and adults: crowded or crooked teeth, a lisp or other speech issues, frequent mouth breathing, snoring, sleep-disordered breathing, a narrow jawline, and facial asymmetry. Many of these symptoms get mistaken for cosmetic issues, but a high palate is primarily a functional problem affecting the airway and bite.

Common mistakes include treating it as purely cosmetic, ignoring an underlying tongue tie before attempting palate expansion, and assuming it can be easily corrected in adulthood without orthodontic or surgical help.

Treatment Options

Treatment depends on age and severity. Early intervention produces the best results, but adults have effective options too, typically combining mechanical expansion with orthodontics.

Orthodontic palate expanders — These appliances widen the upper jaw gradually. Children respond well because their palatal bones are still growing, making expansion faster and more stable. Adults often need a longer treatment period combined with braces or aligners.

Surgically assisted expansion (SARPE) — For severe cases where the bone has fully fused and orthodontic expansion alone won’t work, an oral surgeon makes small incisions to allow the palate to widen. Recovery requires careful post-op management, but the results can be dramatic.

Myofunctional therapy — For ages 4 and up, a myofunctional therapist retrains tongue posture, swallowing, and breathing patterns to support proper palate development and maintain expansion results.

Feeding and speech therapy — Infants may benefit from a feeding specialist or speech-language pathologist who addresses tongue exercises, positioning, and oral motor skills.

If the high palate is linked to Marfan syndrome, cardiac monitoring is essential due to the risk of aortic dissection and valvular problems.

FAQs

Is a high palate the same as a narrow palate?

Yes, the terms are used interchangeably. A high palate is almost always a narrow palate — the roof is taller because the sides are closer together, creating a steep arch instead of a wide, flat one.

Can a high palate fix itself?

No, a high palate does not self-correct. The bone and tissue structure is already formed. Treatment — orthodontic, surgical, or myofunctional — is required to address both the shape and any functional problems it causes.

Does insurance cover high palate treatment?

It depends on the cause. When the condition creates functional issues like breathing problems or feeding difficulties, medical insurance may cover part of the treatment. Standard orthodontic palate expansion is typically covered under dental insurance. Cases linked to genetic syndromes like Marfan’s are more likely to receive medical coverage.